New in 2026: Why Your 401(k) Catch-Up Contributions May Now Have to Be Roth

Are you 50 or older? Did you earn more than $150,000 from your job last year? Then a new rule changed your 401(k) on January 1, 2026. Your extra "catch-up" savings now get taxed today, not later. Many people only find out when their paycheck gets smaller. Here is what changed, who it affects and what to do.

Key Takeaways

• If you are 50 or older and earned more than $150,000 at your job in 2025, your catch-up savings must now go in as Roth. That means you pay the tax now.
• Your regular 401(k) savings, up to $24,500 in 2026, can still go in before tax. Only the extra catch-up amount changes.
• If your work plan has no Roth option, you may not be able to make catch-up savings at all.
• If you are 60 to 63, you can save an extra $11,250. The same rule applies to it.

What Changed

First, two quick terms.

A catch-up contribution is extra money you are allowed to save in your 401(k) once you turn 50. It helps you catch up before you retire.

Roth money is taxed when you put it in. Later, you can take it out tax-free, as long as you follow the IRS rules. Regular 401(k) money is the opposite: no tax now, but you pay tax when you take it out.

A 2022 law, called the SECURE 2.0 Act, made a new rule. If you earn a lot, your catch-up money must go in as Roth. The IRS wrote the final rules in September 2025. The rule started on January 1, 2026. It covers 401(k) plans. It also covers the same kind of plans at schools, hospitals and government jobs, called 403(b) and 457(b) plans.

Here is how much you can save in 2026:

Who It Affects

The rule applies to you if both of these are true:

1. You are 50 or older by the end of 2026.
2. You earned more than $150,000 in 2025 from the job you have now. Look at Box 3 of your 2025 W-2 form.

A few more things to know:

• It's one job at a time. Pay from different jobs is not added together. If you started a new job this year, your new job paid you nothing in 2025. So the rule usually won't apply there until next year.
• Self-employed people are usually not affected. If you don't get a W-2, the rule doesn't apply to your catch-up savings.
• Your plan may make the switch for you. Many plans now put catch-up money in as Roth on their own. Check your plan's letters or your pay stub.

What It Costs, and Why It Isn't All Bad

Roth money is taxed now. So your take-home pay goes down a little.

Example: David is 56 and single. He is an engineer at a Houston energy company. He earned $180,000 in 2025. In 2026, he saves the full $32,500. His first $24,500 still goes in before tax. His $8,000 catch-up now goes in as Roth. The top part of David's income is taxed at 24%. So paying tax on $8,000 now costs him about $1,920 more in federal tax this year. If he's paid every two weeks, that's about $74 less per paycheck. Texas has no state income tax, so that's the whole cost.

Here is what David gets back. That $8,000, and everything it grows to, can come out tax-free when he retires, as long as he follows the IRS rules. And the IRS never makes him take money out of a Roth 401(k) while he's alive. That gives him more control over his taxes later, when they can affect his Medicare costs and how much of his Social Security gets taxed.

For many people in their top earning years, having some Roth money is a good thing. The real question is whether the rest of your savings plan still makes sense.

What Happens If You Ignore It

• A smaller paycheck. If your plan switched you to Roth on its own, your take-home pay may already be lower than you expected.
• A tax bill you didn't plan for. Roth savings count as income you pay tax on. If not enough tax comes out of your paycheck, you may owe more in April.
• Lost savings. If your plan has no Roth option, you can't make catch-up savings at all. If you are 60 to 63, that's $11,250 a year you can't save.
• A plan that no longer fits. If you were counting on catch-up savings to lower your taxes this year, you may need another way.

What to Do Now

1. Find your 2025 W-2 and look at Box 3. If it's over $150,000, the rule applies to you at that job.
2. Check that your plan offers Roth. If it doesn't, ask HR if they will add it.
3. Look at your last few pay stubs to see how your catch-up money is being taxed.
4. Look at your whole plan. Decide if your regular savings should still go in before tax. Check if you need more tax taken out of your paycheck.
5. Are you 60 to 63? Make sure you use the bigger $11,250 catch-up. You only get it for those four years.

A Note for Business Owners and HR Teams

Do you run a 401(k) or 403(b) plan? The rule is already in effect. Your plan needs either a Roth option or a way to stop catch-up savings for workers who earned over $150,000. Your payroll company needs to know who those workers are. Your plan papers may need an update. For 2026, the IRS will go easy on plans that make an honest effort to follow the rule. But mistakes still have to be fixed, and fixing them takes time and money.

As the business that offers the plan, it's your job to make sure it runs the way it is written. An independent 401(k) fiduciary can help. That's an outside expert who must put your plan's interests first. They can check your plan setup, your payroll and what you tell your workers. That way you don't learn about a problem from someone's paycheck.

Frequently Asked Questions

What is the income limit for the Roth catch-up rule in 2026?

The rule applies if you earned more than $150,000 at your current job in 2025. Look at Box 3 of your W-2. The limit goes up a little each year as prices rise.

Do my regular 401(k) savings have to be Roth too?

No. Only the extra catch-up savings. Your regular savings, up to $24,500 in 2026, can still go in before tax if your plan allows it.

What is the bigger catch-up for ages 60 to 63?

In 2026, if you are 60, 61, 62 or 63, you can save an extra $11,250 instead of $8,000. That's $35,750 in total. If you earned over $150,000, it must go in as Roth too.

Does the Roth catch-up rule apply to IRAs?

No. It only applies to retirement plans at work, like a 401(k). Catch-up savings in an IRA are not affected.

Where to Start

The rule itself is simple. What it means for you depends on a few things. How much you earn now. How much you expect to have in retirement. And how your savings are split between Roth and before-tax money today. It's worth looking at them together. A fee-only fiduciary financial planner can help you decide what to change. That's a planner who is paid only by you, not by commissions, and who must put your interests first. It's easiest to start the conversationbefore your last paychecks of the year.